{
  "vercy": "1.0-draft",
  "publication": {
    "status": "research-draft",
    "adjudicationStatus": "unreviewed",
    "publishableCanonical": false,
    "generatedAt": "2026-09-11T11:39:17Z",
    "providers": [
      "Claude"
    ],
    "breadth": "written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify",
    "pass": 2,
    "wave": 1,
    "engine": "claude",
    "enrichment": {
      "pass": 3,
      "engine": "claude",
      "producedAt": "2026-10-05T17:00:00Z",
      "ingestedAt": "2026-10-05T13:26:17+00:00",
      "fields": [
        "agent_conduct",
        "ethics",
        "owners"
      ]
    },
    "gate": {
      "passed": true,
      "version": "1.0",
      "at": "2026-10-06T19:51:53+00:00",
      "evidence": [
        "completeness 1.00",
        "sense: Wikidata description",
        "2 live sources",
        "review by codex: pass"
      ]
    }
  },
  "metaModel": {
    "id": "THING-Q1141942",
    "registryId": "vr.tr.alpha-canum-venaticorum-variable",
    "name": "Alpha² Canum Venaticorum variable",
    "version": "0.2.0-wave.1",
    "entryKind": "thing",
    "family": "Thing Registry",
    "domain": [
      "PHY.SPC"
    ],
    "status": "research-draft"
  },
  "canonicalUrl": "https://ver.cy/models/thing/q1141942/",
  "model": {
    "registry_id": "vr.tr.alpha-canum-venaticorum-variable",
    "name": "Alpha² Canum Venaticorum variable",
    "purpose": "Let an agent describe alpha2 CVn variables by star, period, magnetic field and spectroscopy, with sourced data.",
    "definition": "A chemically peculiar Ap or Bp main-sequence star with a strong, ordered magnetic field and surface abundance spots, whose brightness and spectrum vary with rotation over periods of about 0.5 to 160 days; named after Alpha2 Canum Venaticorum. Rapidly oscillating Ap stars are a related class with pulsations of minutes.",
    "what_it_is_for": "Studying stellar magnetism and chemical peculiarity.",
    "affordances": [
      "identify alpha2 CVn stars and periods",
      "explain rotational modulation",
      "distinguish them from roAp stars",
      "find photometric and spectroscopic data"
    ],
    "distinguishing_features": [
      "Strong magnetic fields",
      "Chemical spots",
      "Rotational variability",
      "Oblique rotator model"
    ],
    "appearance": "Blue-white stars with small periodic brightness changes.",
    "visual_identification": [
      "Ap or Bp spectral types",
      "Rotation-linked variability",
      "roAp stars pulsate on minute timescales"
    ],
    "physical_properties": [
      {
        "quantity": "rotation period",
        "typical_range": "about 0.5-160",
        "unit": "days",
        "note": ""
      },
      {
        "quantity": "amplitude",
        "typical_range": "about 0.01-0.1",
        "unit": "magnitudes",
        "note": "typical"
      }
    ],
    "families_and_kinds": [
      "classical alpha2 CVn variables",
      "magnetic Bp stars",
      "rapidly oscillating Ap stars (related)"
    ],
    "related_models": [
      {
        "relation": "is a kind of",
        "target": "rotating variable star and Ap/Bp star",
        "why": "category"
      },
      {
        "relation": "is named after",
        "target": "Alpha2 Canum Venaticorum",
        "why": "prototype"
      },
      {
        "relation": "is explained by",
        "target": "oblique rotator model",
        "why": "theory"
      },
      {
        "relation": "is catalogued in",
        "target": "GCVS and VSX",
        "why": "catalogues"
      }
    ],
    "identifiers": [
      {
        "scheme": "GCVS type",
        "value_or_pattern": "ACV",
        "note": "variable star type"
      }
    ],
    "standards_and_regulation": [
      "IAU variable star nomenclature"
    ],
    "failure_modes_and_hazards": [
      "Confusing ACV and roAp stars",
      "Overinterpreting small amplitudes"
    ],
    "in_scope": [],
    "out_of_scope": [],
    "characteristics": [],
    "agent_conduct": {
      "may": [
        "Report catalogued Alpha2 Canum Venaticorum variables with their periods and sources.",
        "Analyze light curves and spectra to classify a star as this type, stating the uncertainty."
      ],
      "must_not": [
        "Confuse these stars with rapidly oscillating Ap stars.",
        "Claim a new variable star from small amplitude signals without checking for instrument effects.",
        "Alter catalogue entries without stating the source of the change."
      ],
      "requires_human": [
        "Submitting a new classification to a variable star catalogue."
      ]
    },
    "ethics": {
      "considerations": [
        "Honest reporting of weak signals keeps the astronomical record trustworthy."
      ],
      "affected_parties": [
        "Astronomers and observers",
        "Users of variable star catalogues"
      ]
    },
    "owners": {
      "steward": "Nobody owns them; variable star catalogues and the astronomical community keep the records.",
      "master_systems": [
        "General Catalogue of Variable Stars",
        "International Variable Star Index"
      ]
    }
  },
  "sources": [
    {
      "id": "wikidata",
      "title": "Wikidata item Q1141942: Alpha² Canum Venaticorum variable",
      "url": "https://www.wikidata.org/wiki/Q1141942",
      "url_status": "live",
      "what_it_supports": "identity and sense of the item",
      "checked_by": "wikidata-api"
    },
    {
      "id": "wikipedia-en",
      "title": "Wikipedia: Alpha2 Canum Venaticorum variable",
      "url": "https://en.wikipedia.org/wiki/Alpha2_Canum_Venaticorum_variable",
      "url_status": "live",
      "what_it_supports": "general description of the item",
      "checked_by": "wikidata-api sitelink"
    }
  ],
  "structure": {
    "bundles": [
      {
        "id": "star",
        "name": "Star",
        "description": "Which star.",
        "rationale": "Catalogues identify.",
        "layers": [
          {
            "id": "identity",
            "name": "Identity",
            "description": "Designation.",
            "findings": [
              {
                "id": "identity-finding",
                "name": "Identity",
                "description": "Designation.",
                "questions": [
                  {
                    "text": "Which star is meant, and is it classified as ACV?",
                    "kind": "provenance"
                  },
                  {
                    "text": "What is its spectral type?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          },
          {
            "id": "period",
            "name": "Period",
            "description": "Rotation.",
            "findings": [
              {
                "id": "period-finding",
                "name": "Period",
                "description": "Rotation period.",
                "questions": [
                  {
                    "text": "What is its rotation period and amplitude?",
                    "kind": "measurement"
                  },
                  {
                    "text": "From which survey data?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "physics",
        "name": "Physics",
        "description": "Magnetism.",
        "rationale": "Magnetic fields shape the star.",
        "layers": [
          {
            "id": "field",
            "name": "Field",
            "description": "Magnetic field.",
            "findings": [
              {
                "id": "field-finding",
                "name": "Field",
                "description": "Magnetic field.",
                "questions": [
                  {
                    "text": "How strong is the magnetic field, according to spectropolarimetry?",
                    "kind": "measurement"
                  },
                  {
                    "text": "How is it oriented?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          },
          {
            "id": "spots",
            "name": "Spots",
            "description": "Abundance spots.",
            "findings": [
              {
                "id": "spots-finding",
                "name": "Spots",
                "description": "Chemical spots.",
                "questions": [
                  {
                    "text": "Which elements are concentrated in surface spots?",
                    "kind": "provenance"
                  },
                  {
                    "text": "How are spot maps made?",
                    "kind": "definition"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "classes",
        "name": "Classes",
        "description": "Related types.",
        "rationale": "Classes differ.",
        "layers": [
          {
            "id": "roap",
            "name": "roAp",
            "description": "Rapid oscillators.",
            "findings": [
              {
                "id": "roap-finding",
                "name": "roAp",
                "description": "Rapidly oscillating Ap stars.",
                "questions": [
                  {
                    "text": "Does the star also show rapid oscillations?",
                    "kind": "provenance"
                  },
                  {
                    "text": "How do roAp stars differ from ACV variables?",
                    "kind": "definition"
                  }
                ]
              }
            ]
          },
          {
            "id": "chemically-peculiar",
            "name": "Chemically peculiar",
            "description": "Ap and Bp stars.",
            "findings": [
              {
                "id": "chemically-peculiar-finding",
                "name": "Chemically peculiar",
                "description": "Chemical peculiarity.",
                "questions": [
                  {
                    "text": "What makes Ap and Bp stars chemically peculiar?",
                    "kind": "definition"
                  },
                  {
                    "text": "Which processes explain it?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "observing",
        "name": "Observing",
        "description": "Contributing.",
        "rationale": "Precision is needed.",
        "layers": [
          {
            "id": "photometry",
            "name": "Photometry",
            "description": "Small amplitudes.",
            "findings": [
              {
                "id": "photometry-finding",
                "name": "Photometry",
                "description": "Photometry.",
                "questions": [
                  {
                    "text": "What photometric precision is needed to detect the variation?",
                    "kind": "measurement"
                  },
                  {
                    "text": "Can amateurs contribute?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          },
          {
            "id": "submit",
            "name": "Submit",
            "description": "Databases.",
            "findings": [
              {
                "id": "submit-finding",
                "name": "Submit",
                "description": "Submitting data.",
                "questions": [
                  {
                    "text": "How can observations be submitted to variable star databases?",
                    "kind": "action"
                  },
                  {
                    "text": "Which organisation runs them?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      }
    ]
  },
  "openQuestions": [
    "Should roAp stars be a separate entry?",
    "How should magnetic field data be linked?",
    "How should spot maps be sourced?"
  ],
  "statistics": {
    "bundles": 4,
    "layers": 8,
    "findings": 8,
    "questions": 16
  }
}